Room kotlin: Entities and Pojos must have a usable public constructor. Stuck on this error

Well it says they shouldn't be constructor parameters, so try making them not constructor parameters.

class TaskModel() {
    @Embedded
    lateinit var taskTable: TaskTable

    @Relation(parentColumn = "id",
              entityColumn = "taskId")
    lateinit var subTaskTable: List<SubTaskTable>
}